Question:
What special name can be given to a quadrilateral whose all angles are equal?
Solution:
We know that, sum of all angles in a quadrilateral is 360°.
Let each angle of the quadrilateral be x.
x + x + x + x = 360°
⇒ 4x = 360°
⇒ x = 90°
⇒ All angles of the quadrilateral are 90°.
Hence, given quadrilateral is a rectangle.